Thermometer



FIG. 1 is a left front perspective view of a thermometer showing my new design;

FIG. 2 is a right front perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof in a horizontal position;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a left side elevational view thereof in a horizontal position. 

The ornamental design for a thermometer, substantially as shown. 